SVG 1.1 dynamic update tests
Tests dynamic updates of the 'dx' attribute of the SVGFEDropShadowElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS dropShadowElement.getAttribute('dx') is "0"
PASS dropShadowElement.getAttribute('dx') is "10"
PASS successfullyParsed is true
TEST COMPLETE